[Editing Training session makes it unavailable, as Semipro team]

I am having the same issue.  I put more information in this thread;

 

[Two issues, Captaincy message about player not at team and training disappearing]

I am seeing issue 2 as well.  I saw this in football manager 23 as well (though not as frequently).  

 

On the image I attached the top training shows the original.  After I added training (One time I added something and team bonding).

 

I am seeing it again right now.  Here are the combinations that failed:

• Attack / Defending and then match tactics / team bonding
• Just changed attacking / defending and it disappeared
• Changed 2nd group match practice to rest and all disappeared

Seems to be really any combination makes the training disappear.  I added training fail 2nd example to show what I was changing with the combinations above.